MTD
Front-Tine Tiller

Model # 21A-34M8799 Official MTD front-tine tiller

Here are the diagrams and repair parts for Official MTD 21A-34M8799 front-tine tiller, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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Showing 10 of 213 parts  |

Yard Machines Lawn & Garden Equipment Lock Nut, 5/16-18 (replaces 753-05591) 712-04063
Yard machines lawn & garden equipment lock nut, 5/16-18 (replaces 753-05591)

Part #712-04063

BEST SELLER
This item is not returnable
$4.53
18% OFF Phone Price : $5.53
In Stock
Lawn Tractor Self-tapping Screw, 5/16-18 X 3/4-in (replaces 01008620) 710-04484
#32

Handles/wheels diagram

Lawn tractor self-tapping screw, 5/16-18 x 3/4-in (replaces 01008620)

Part #710-04484

BEST SELLER
This item is not returnable
$4.93
17% OFF Phone Price : $5.93
In Stock
Yard-man Lawn Tractor Cotter Pin 714-04043
Yard-man lawn tractor cotter pin

Part #714-04043

This item is not returnable
$7.49
12% OFF Phone Price : $8.49
In Stock
Lawn & Garden Equipment Screw (replaces 710-0805, 9854, Gw-9854) 710-0805A
#6

Handles/wheels diagram

Lawn & garden equipment screw (replaces 710-0805, 9854, gw-9854)

Part #710-0805A

This item is not returnable
In Stock
Kmart Tiller Tine Shield 786-0043A-4044
#17

Engine/tines diagram

Kmart tiller tine shield

Part #786-0043A-4044

In Stock
Tiller Depth Stake Bracket, Right 786-0004-0637
#10

Handles/wheels diagram

Tiller depth stake bracket, right

Part #786-0004-0637

In Stock
Kmart Tiller Handle (replaces 649-04040, 649-04040-0721) 649-04040-4044
#12

Handles/wheels diagram

Kmart tiller handle (replaces 649-04040, 649-04040-0721)

Part #649-04040-4044

$153.12
7% OFF Phone Price : $165.12
In Stock
Tiller Tine Assembly (replaces 642-0003) 642-0003-0637
#3

Engine/tines diagram

Tiller tine assembly (replaces 642-0003)

Part #642-0003-0637

$81.99
7% OFF Phone Price : $87.99
In Stock
Lawn & Garden Equipment Lock Nut 712-0266A
#25

Engine/tines diagram

Lawn & garden equipment lock nut

Part #712-0266A

This item is not returnable
In Stock
Lawn & Garden Equipment Wave Washer 936-0232
#43

Handles/wheels diagram

Lawn & garden equipment wave washer

Part #936-0232

This item is not returnable
In Stock

Most common symptoms to help you fix your tillers

Choose a symptom to see related tiller repairs.

Main causes: clutch cable problems, faulty transmission…

Main causes: damaged tines, broken clevis pins, worn drive belt, faulty transmission, clutch cable problems, improper de…

Main causes: worn or broken drive belts, bad transmission, clutch cable problems…

Main causes: leaky engine head gasket, damaged sump gasket, damaged oil drain plug seal, loose or cracked fuel line, lea…

Main causes: broken shaft clevis pins, transmission failure…

Main causes: dirty carburetor, engine needs tune up, stale gas…

Main causes: carburetor failure, bad gasoline, dirty spark plug, broken recoil starter…

Most common repair guides to help fix your tillers

These step-by-step repair guides will help you safely fix what’s broken on your tiller.

How to replace a tiller recoil starter

How to replace a tiller recoil starter

The recoil starter spins the engine when you pull the starter rope, and the rope retracts when released. If the recoil s…

Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your tillers

Use the advice and tips in these articles and videos to get the most out of your tiller.

How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

Find the right carburetor assembly for a Craftsman snowblower, tiller or log splitter

Find the right carburetor assembly for a Craftsman snowblower, tiller or log splitter

This chart will help you find the right carburetor for your Craftsman snowblower, tiller or log splitter.…